Write a program that reads an integer and then calculates and displays its reverse.
Example:
Entry: 19740 
Display: 4791

#include <stdio.h>
#include <conio.h>
#include <limits.h>

void main()
{
	unsigned int  NB; 
 	unsigned int  REV;   


 	do
   	{
     		printf("Enter a positif integer (%u) : ", UINT_MAX );
    		scanf("%u", &NB);
   	}while (NB<0 || NB >UINT_MAX);
 
	REV=0;
 	while(NB>0)
    	{
     		REV *= 10;
     		REV += NB%10;
     		NB /= 10;
    	}
 
 	/* or : */
 	/* for (REV=0 ; NB>0 ; NB/=10)
        	REV = REV*10 + NB%10;
 	*/

 	printf("Reverse number : %u\n", REV);

	getch();
}